Family

Blechnaceae

Nomenclature

Woodwardia harlandii Hook., Fil. Exot.: t. 7. 1867; P.S.Chiu, Acta Phytotax. Sin. 2: 237–248. 1974; C.E.Devol, Fl. Taiwan 1: 156. 1980; P.H.Hô, Illustr. Fl. Vietnam 1: 259. 1991; K.Iwats., Ferns and Fern Allies of Japan 157, pl. 90. 1992; Boonkerd & Pollawatn, Pterid. Thailand: 148, 181. 2000; Boonkerd & Pollawatn, Thai For. Bull. (Bot.) 32: 2. 2004.

Description

Rhizome creeping, covered with small scales; scales broadly lanceolate, entire; stipes distant in mature plants, covered with small narrowly lanceolate scales at base. Frond dimorphic. Stipes brown-black at base, stramineous in upper portion, scaly at base, grooved; sterile stipe 12–24 cm long, fertile stipe up to 45 cm. Sterile lamina up to 24 cm long, simple, lanceolate, or tri-palmately lobed, terminal lobe the longest, base rounded, margin serrate near apex and shallowly lobed below, coriaceous, light green to light brown when dry. Fertile lamina up to 40 cm long, simply pinnate, with an elongated terminal pinna, lateral pinnae 3–5 pairs similar to the terminal one, pinnae sessile, forming a winged rachis with the opposite lateral pair, oblong, 20–25 by 2.5–3 cm; veins anastomosing. Sori linear, along costal and costular areoles; indusia linear, narrow, thin, opening towards costa or costule .

Distribution in Thailand

NORTH-EASTERN: Loei.

Wider Distribution

South Japan, South China, Taiwan and Vietnam.

Ecology

Terrestrial, on dry hill slope in hill evergreen forest, semi-shade at 1200 m altitude.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread outside of Thailand and not under any known threat.